normal dynamic height

例句：

1. 1. The temperature is normal for this time of year.
   这个季节的气温是正常的。
2. 2. This is a normal amount of work for the job.
   这份工作所需的工作量是正常的。
3. 3.She wears glasses to correct her vision and looks normal.
   她戴眼镜是为了纠正视力，看起来正常。